Frame-clamp.



PATENTBD mm, 1907.

No. 840,177. y o. W. LAWSON. f FRAME CLAMP. A'PPLIOATIONIIILBD 111911.20. 190e.

WTNESSES ATTURNEYS rus Nams Psfzns c lrAfiniw oFFion.

p STATES l CHARLES WILLIAM LAWSON, or wATEiaeUnY, CONN-sorrow. A FRAME-CLAMP.

To .all whom t may concern.-

`Be it known that I, CHARLES WILLIAM LAWSON, a citizen of the United States, residing at Waterbury, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Frame-Clamps, of which the following is a speciiication, such as will enable those skilled in the art to which it appertains to make and use the same.

This invention relates to clamp devices for use in making mitered frames, such as picture-frames, sash-frames, and any other frames of this class; and the object thereof is to provide an improved clamp device for this purpose which is simple in construction and operation and by means of which a picture or similar frame of any desired size may be conveniently held and clamped for the pur ose of securing the parts thereof toget er.

The invention is fully disclosed in the following specication, of which the accompanying drawings form a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which- Figure 1 is a plan view ofmy improved clamp device, and Fig..2 a section on the` line 2 2 of Fig. 1 and showing the clamp device mounted on a rotatable table.

In the practice of my invention I rovide two central block members a, each o which comprises a bottom portion @Zand top portion a3, and the top portions c3 are preferably of greater dimensions than the bottom portions a2.

The blocks a vare mounted between ari allel side guides b, formed integrally wit or rigidly secured to a transverse bottom member b2, and the blocks a are provided with side grooves a4, and the side guides b are provided with corresponding longitudinal ribs b3, which iit in said grooves, and said ribs and grooves may be circular in cross-section, as shown at the left-hand side of Fig. 2, or angular in cross-section, as shown at the right-hand side of Fig. 2. Passing through the blocks a is a screw c, the separate end portions of which are provided with reverse threads,I and by turning said screw the blocks a may be drawn together or forced apart, according to the direction in which said screw is turned.

Pivoted to the to s of the blocks a or to the tops of the tabe portions thereof and .Sp-eccaton of Letters Patent.- Application led April 20, 1906. Serial ljoi 312,843. v

natented Jan. s, 2190"?,l

preferably adjacent to the adjacent edges thereof are arms d, said arms bein-g arranged in pairs and each block being provided with one pair., and the blocks a or the table portions. thereofv are Vprovided with segmental or circular slots or Agrooves a5, through which j are passed bolts d2, which also pass through longitudinal slots'or openings dain the arms d andare provided with thumb-nuts d?, and bymeans of this construction the arms d may be swung ina horizontal plane and adjusted to any desired position and secured in said position. with angular clamps e, which are connected with said arms by bolts e2, which are also passed through slots da in the arms dand provided with thumb-nuts e3, by means of which said clamps may be adjusted to any desired point on the .arms d. The clamps e are provided with separate arms separated by an angle of ninety degrees, and each arm is rovided with a head e4.

n'practice the 'device may be mountdon any suitable support f, as shown in Fig. 2, and connected therewith by means of a screw f2 passed through the transverse bottom member b2, and whenever it is desired to make a frame or' secure the separate parts of a frame together the frame members are.

placed on the clamps e, as shown at g, the arms d being first properly adjusted, after which the screw c is turned so as to force the blocks a together, and in this operation the separate partsy of the frame `are securely clamped together, as shown in Fig. 1, and may be nailed together by means of nails h, which are shown in Fig. 1 inposition for driving. The separate parts of the frame may, however, be secured together by gluing or in any desired manner, and it will be apparent that my improved clampframe may be employed in the making of frames of any desired size and the separate parts of the clamps e may be of any preferred length.

It will be understood, of course, that the transverse bottom member b2 may be of any preferred size, width, or construction, all that is necessary in this connection being to provide side guides b rigidly connected by a transverse member, whereby the said side guides form a irm support for the blocks c, which are held thereby and between which said blocks are`movable.

My improved clamp device is simple in construction and comparatively inexpensive, and it will be apparent that the same may be The arms d are also provided IOO IIO

employed when making mitered or similar frames of anyIl kind or class.

Having fully described my intentiomwhat I claim as new, and desire to secure byHLet-V ters Patent, is-

A clamp of theclasszddescribed, comprising a biasememberv vprovided with parallel 'side guides which extend above the same, blocks movable between said guides, a screw passed horizontally lthrough said blocks and Vin the plane of said guides and yprovided at its oppo-l site'ends with reversed threads, said blocks being provided with bores which ,are correspondingly threaded, whereby the turning of said screws will force said blocks apart or draw them together, a pair of arms pivoted tothe top of each of said blocksand near the adjacent side faces thereof, and said arms CHARLES WILLIAM LAWSON.

l Witnesses WALTER E. MONAGAN, JAMES A. PEAsLEY 

